Development of high-strength magnesium alloys via combined processes of extrusion, rolling and ageing

Li, R.G.; Nie, Jian Feng; Huang, Guangsheng; Xin, Yunchang; Liu, Q.

doi:10.1016/j.scriptamat.2011.01.042

Cited by 208 publications

(56 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[172,173] It is often necessary to increase the Gd concentration to the range 10 to 20 wt pct to enhance the precipitationhardening response. [173][174][175][176] The aging curve of a Mg15Gd-0.5Zr (wt pct) alloy is shown in Figure 19(a). [177] The hardness value in the as-quenched condition is over 70 VHN, which is substantially higher than that of the magnesium alloys described in previous sections.…”

Section: Mg-gd Binary Alloysmentioning

confidence: 99%

“…This relatively high value of hardness is the result of solidsolution strengthening in a supersaturated magnesium matrix. It was demonstrated recently [176] that an appreciably high 0.2 pct proof strength of 445 MPa can be achieved in a Mg-14 wt pct Gd-0.5 wt pct Zr alloy when this alloy is produced by the combined processes of hot extrusion, cold work, and aging (Table II).…”

Section: Mg-gd Binary Alloysmentioning

confidence: 99%

See 1 more Smart Citation

Precipitation and Hardening in Magnesium Alloys

Nie

2012

Metall Mater Trans A

1,354

519

View full text Add to dashboard Cite

Magnesium alloys have received an increasing interest in the past 12 years for potential applications in the automotive, aircraft, aerospace, and electronic industries. Many of these alloys are strong because of solid-state precipitates that are produced by an age-hardening process. Although some strength improvements of existing magnesium alloys have been made and some novel alloys with improved strength have been developed, the strength level that has been achieved so far is still substantially lower than that obtained in counterpart aluminum alloys. Further improvements in the alloy strength require a better understanding of the structure, morphology, orientation of precipitates, effects of precipitate morphology, and orientation on the strengthening and microstructural factors that are important in controlling the nucleation and growth of these precipitates. In this review, precipitation in most precipitation-hardenable magnesium alloys is reviewed, and its relationship with strengthening is examined. It is demonstrated that the precipitation phenomena in these alloys, especially in the very early stage of the precipitation process, are still far from being well understood, and many fundamental issues remain unsolved even after some extensive and concerted efforts made in the past 12 years. The challenges associated with precipitation hardening and age hardening are identified and discussed, and guidelines are outlined for the rational design and development of higher strength, and ultimately ultrahigh strength, magnesium alloys via precipitation hardening.

show abstract

Section: Mg-gd Binary Alloysmentioning

confidence: 99%

Section: Mg-gd Binary Alloysmentioning

confidence: 99%

Precipitation and Hardening in Magnesium Alloys

Nie

2012

Metall Mater Trans A

1,354

519

View full text Add to dashboard Cite

show abstract

“…Therefore, a lot of efforts on the LPSO structure magnesium alloys have been made. Some researches focus on the effect of processing technology on the alloys, such as extrusion [10,11,12], hot-rolling processing [13,14] and ageing treatment [15]. Some others pay more attention to influence of elements addition [16,17,18] or substitution [19,20,21] on microstructure and mechanical properties of Mg-based alloys.…”

Section: Introductionmentioning

confidence: 99%

The Fracture Processes of Mg81Ni8Zn5Y6 Bulk Metallic Glass Matrix Composite with a Long-period Stacking Ordered Structure

Qiu¹,

Fu²,

Song³

et al. 2017

dtetr

View full text Add to dashboard Cite

Abstract. Mg81Ni8Zn5Y6 bulk metallic glass matrix composite samples with long-period stacking ordered(LPSO) structure were fabricated by conventional Cu-mold casting method and the shear scenarios of them were investigated under uniaxial compressive loading with different stresses. The phase formation and spatial microstructure of the alloy were investigated by using X-ray diffraction and scanning electron microscopy. The fracture scenarios were analyzed based on the observation of the lateral surfaces and the fracture surfaces. Six stages can be outlined as stress concentration, embryonic shear bands formation, mature shear bands formation, shear bands propagation, shear band multiplication and shear-off. The influence of the LPSO phase on the fracture mechanism of the Mg-based amorphous matrix composite during the fracture process was systemically described.

show abstract

“…Wrought processes such as extrusion, forging and rolling performed on the Mg-RE alloys have been extensively investigated [6][7][8][9][10][11][12]. Mg-1.8Gd-1.8Y-0.7Zn-0.2Zr (at.%) alloy with remarkable high ultimate tensile strength of 542 MPa, proof stress of 473 MPa and elongation to failure of 8% was successfully fabricated by indirect extrusion [6].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of rolled sheets of Mg–Gd–Y–Zn–Zr alloy: As-cast versus as-homogenized

Zheng

et al. 2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Development of high-strength magnesium alloys via combined processes of extrusion, rolling and ageing

Cited by 208 publications

References 28 publications

Precipitation and Hardening in Magnesium Alloys

Precipitation and Hardening in Magnesium Alloys

The Fracture Processes of Mg81Ni8Zn5Y6 Bulk Metallic Glass Matrix Composite with a Long-period Stacking Ordered Structure

Microstructure and mechanical properties of rolled sheets of Mg–Gd–Y–Zn–Zr alloy: As-cast versus as-homogenized

Contact Info

Product

Resources

About